Dont have any experience with LWRC. The Bushmaster gas piston rifle is the same system as POF, if you look at POF field stripped it makes me think that Bushmaster supplies the rifle in parts, and POF applies their nickel coatings, certain unique parts, etc. POF cannot import much so I dont know what they actually manufacture in the US. They do have a licensed contract with Bushmaster though.
Im impressed with the POF/Bushmaster so far. Good price, great rifle.